TDA8380A Datasheet, PDF (2/20 Pages) NXP Semiconductors – Control circuit for switched mode power supplies

Philips Semiconductors
Control circuit for switched mode power supplies
Product specification
TDA8380A
GENERAL DESCRIPTION
The TDA8380A is an integrated circuit intended for use as a control circuit in low-cost switched mode power supplies for
television, monitors and small industrial equipment. The TDA8380A operates using duty factor regulation in the fixed
frequency mode.
Features
• A low-current initialization circuit (maximum 150 µA) which can be switched off
• A bandgap reference generator
• Circuitry for slow-start combined with an accurate setting of the maximum duty factor (D_max)
• Programmable low supply voltage protection with one default value
• High supply protection circuitry
• Error amplifier with a transfer characteristic generator (TCG)
• Protection against open- and short-circuited feedback loop
• An overload voltage foldback
• Primary current protection circuitry for both cycle-by-cycle and trip mode
• Protection against transformer saturation
• A direct drive output stage (sink current 2.5 A, source current 0.75 A)
• Anti-double pulse logic
• Protected against damage as a result of a short-circuited high-voltage transistor
• RC oscillator with synchronization input
QUICK REFERENCE DATA
PARAMETER
Supply voltage
Supply current
Output pulse repetition frequency range
Operating ambient temperature range
SYMBOL
V_CC
I_CC
f_o
T_amb
MIN.
−
−
10
−25
TYP.
14
−
−
−
MAX.
−
15
100
+ 70
UNIT
V
mA
kHz
°C
PACKAGE OUTLINE
16-lead DIL; plastic (SOT38); SOT38-1 ; 1996 November 18.
November 1993
2